Blowpipe.



W. I.` REICH.

BLOWPIPE.

APPLICATION FILED JUNE 21, 1910.

Patented May 19, 1911 UMTED sTArEsrATENT oFFioE.

wir/'narratif L REICH, or NEW Yoann. Y.

BLowPIPE.

To all 'whom it may concern.

Be it known that I, WILLIAM I. Buien, a citizen of the United States of America,re siding -in New York, in the borough of Manhattan, county and State of New York, have invented certain new and useful Improvements in Blowpipes, of which the following is a specification.

This invention relates to blow-pipes of the kind which are adapted to conduct two streamsof gas, for instance, oxygen and a fuel-gas, and discharge them together in a highly heated iiame;

,The object of this invention is to provide ina device 'cf this kind suitable valves for preventing backiiashing into the conducting channels of either gas, and to so arrange these valves that there can be no discharge of any gas backwardly into either of said channels under any circumstances, or, for example, if the end-nozzle of the blow-pipe should become stopped up that gas which has the higher pressure would not be able to force itself back into the channel or reservoir of the other gas.

Another object is to provide a blow-pipe which will very eiiiciently mix the gases used, both before andV after the nal -discharge from the blow-pipe.

Still another object is to provide adjustable means for controlling the Aamount/'of each gas passing through the blow-pipe, and

additional means for at will varying said amounts. And another object is to provide,

means ,whereby the current of gas and air is so guided as to emanate from the blow-pipe in'al whirling manner, by means of which certain metals heretofore not capable of being operated upon, may be successfully manipulated.

In order to accomplish these objects I have provided a unitary cut-ofi' valve for the conducting channels of both gases whereby the openings ofV said valve through which the gases pass may be varied or slmultaneously cut ofi", and further have provided particular valves in both the fuel and air channels so as to prevent any back-Hash. Furthermore, I have provided in consonance with the object;- of my invention a special form of mixing chamber, and also improved discharge-orifices.

In the accompanying drawing, Figure 1 is a longitudinal sectional view of the blowpipe, Fig. 2 is a sectional ,View taken on the line 2 2 of Fig. 1, showing the cut'oii' e Patented May 19, 1914.

showing the improved valves of the blowpipe for preventing theback-ash, Fig. 4

is a 'side-elevation of a detachable member valve, Fig. 3 is an enlarged sectional view' responding partsthroughout the several fig- K ures of the ravi/ing.l

VReferring more particularly to the drawing, I. have shown a blow-pipe adapted to utilize a fuel-gas as acetylene and a combustion-supporting gas as oxygen, the fuel-,gas being hereinafter referred to simply as fuelgas and the,combustion-supporting gas being referred to as oxygen. However, it is understood that any suitable gases may be used. s The burner is provided with a pipe 10 forming a channel for the fuel-gas and a pipe 11 forming a channel for the oxygengas, the flow of 4gases through said pipes being controlled by the cock 12, which comprises a tapering portion 13 through which said channels pass transversely, as shown. A spigot 14 having a handle 15 is rotatably receivedby said tapering portion 13 and is provided with a pair of parallel bores 16 and 17 passing therethrough and adapted, when saidvalve is turned to open position,

to be placed vin alinement with the channels Y of said pipes 10 and 11. It will be noticed that the bore 1-7 and its-corresponding chan- 'nel are of a considerably smallerl diameter than the bore 16, as also the diameter of the spigot is of considerably larger diameter where the bore' 1.6 passes through it, than at the place where the boreA 17 passesl through it. Notwithstanding that the plug is tapering inv shape, and smaller at the oxygen-bore than at the fuel-bore, t'he difference in angular movement ,at the two portions of the plug is so small that the small movement necessary to close the bore 17 is insuicient to close the bore 16. This arrangement permits the closing or partial closingof the bore 17 without noticeably closing the bore 16. This accomplishes the regulation of the amount of oxygen passing through the pipe 11 without alecting materially (the amount of fuel-gas passing` through the pipe 10. Thus the amount of oxygen may be regulated without greatly diminishing the amount of fuel-gas. The main point of the invention residesinthe varied exposureV of the inlet and the loutlet ends of the bores to the pipes 16 and 17; that is by the turning of `the spigot 14, the bore 17 is flrstcut oli from the inlet of pipe 11 and then by further turning, the bore 16 is cut ofi' from the inlet of pipe 10. Pipes 18 and 19 conduct the oxygen vand fuel-gas respectively to the stationary head l20 carrying the movable nozzle 21. The head 20 is provided with a central oxygen-channel 22 communicating with the pipe 18. A connect-ing chamber 23 is provided near one end of the head 20 which surrounds the channel 22 and which communicates with the pipe 19. In'the end-face of the head 2O an annular valve-chamber 24 is provided having a plurality of 4orifices 25 communicating with the chamber 23. The oxygen-channel 22 is provided at its outer end with a circular valvechamber 26 concentric with the annular valve-chamber 24', and forming therewith an annular wall 27 which is both internally and externally threaded for purposes which will hereinafter appear.

Within the annular valve-chamber 24 is provided a movable annular valve 28 having an inner flat face and a peripheral flange 30 adapted to snugly cover the orifices when said valve is pressed rearwardly.

In order t0 limit the movement of the valve- 28 and to adi ust said limit of movement a nut 29 is placed y means of its central opening upon the outside' of the annular wall 27,

and by adjusting said nut the amount of space left at the forward-edge of the flange 30 of the valve 28 may be determined, the fuel-gas passing around the edges of the valve and between it andthe wall 27, sufiicient clearance being allowed for this purpose. A circular valve 31 having a peripheral flange 311 is placed wit-hin the chamber 26v and has its movement limited by the nut 32, but is provided with a plurality of orifices 33 to permit the flow of oxygen when said valve is pressed against the nut 32, but sufiiciently small as not to impair the quick response and return motion of the valve to its seat under the influence of the increased pressure of gases of a back-flash. The object of the eripheral flanges of the valves is to guide t e same so as to assume auniform movement of the same. The movable nozzle 21 is provided with a smooth ,flat face 211 which fits against the end-face of the head 20. This nozzle is also provided at said face with a shouldered flange 34 adapted to re.- ceive the shouldered flange of ,a collar 35 screwed to the head 20, whereby said movable nozzle'may be adjustably and interchangeably secured to the head 20. The movabl'evnozzle 21 is provided with a channel 36 for the gas mixture. yThe inner end of said channel is co-axialwith the oxygenchannel 22 and the chamber 36al and is provided with an adjustable tip-nozzle .37

screwed thereinto. The tip-nozzle communicates with the\chamber 26, as'shown.. These tip-nozzles are .interchangeable and enable the nozzle to be used for different sized blowpipes. The 'tip-nozzle 37 is provided with a plurality of channels 39 communicating with the mixing chamber 241 and adapted to conduct the fuel-gas and oxygen from the chamber 241 to the channel 36. It will be seen that by adjusting the tip-nozzle the channels 39 may be partially or wholly closed from connection withthe chamber 26 by the contraction or enlargement which is thereby produced of the s ace between'the tapering inner end of the t1p-nozzle and the-wall 27, as indicated in Fig. 3. As is well known the flow of' oxygen causes an injector act-ion on the fuel and both enter channel 36 in their mixed condition.

The movable nozzle 21 comprises the base 40 having a screw-threaded reduced portion 41 at its outer end adapted to receive thereon the cylindrical shell 42. Within said shell 42, and forming therewith and with the reduced portion 41 a mixing chamber 43, is a plug 44, said plug extending to the outer end of the shell 42. This plug 44 is provided with a tapering axial Opening 45 forming a central discharge-outlet from the chamber 43. The plug 44 is rovided with a broad annular chamber 46 orming therewith and with said shell 42 a chamber communicating by means of a plurality of chan-v nels 47 with the opening 45 near the mixing chamber 43. The forwardl end of the plug 44 is provided with a plurality of spiral grooves 48 communicating with the cham-I ber and forming discharge-orifices for the gas mixture. The gas mixture is expanded and well mixed in the chamber 43. From there it passes through the opening 45 and is compressed. Part of the gas is forced through the openings 47 into the chamber 46 Where it expands, which chamber serves as a reservoir from which it discharges in a plurality of small flames emanating from t-he grooves 48. rlhe grooves 48 being arranged in spiral, a good mixture is effected thereby, and furthermore the smaller flames are caused to ignite the large central iow in case the flame is extinguished; whereby v the flame is prevented from blowing out due to high pressure in the central opening 45. The spiral arrangement also causes a vortex in the flame which ycauses an intimate mixing of the gases necessary to produce a good flame and is desirable whenmelting certain metal since it gives a whirling motion to the particular mass under treatment. For larger blow-pipes it is very often-desirable and necessary to have multiple channels, and mixing chambers, and such an embodiment is shown in Fig. 1, in which an outer charnber 85 fed bychannels 86 and outer orifices p 87 are shown.

vchannel or reservoir-of the other gas if the 4channel 36 should become sto pcd up. By adjustlng the nuts 29 and 32 t e amount ofV gas 'fiowing from either the fuel-channel or the oxygen-channel may be regulated.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a blow-pipe, .the combination of a stationary 4head provided with an y"annular valve-chamber, a circular valve-chamber con- .s centric with said annular valve-chamber, a

check-valve in said annular chamber, separate inlet-channels communicating with said chambers respectively, a nozzle, and an outlet-channel in said nozzle communicating with said chambers.

2. In a blow-pipe, the combination of a stationary head provided with an'annularv chamber and a circular chamber concentric wlth each other, the wall between said chambers being internally and externally screw-A threaded, a circular valve within said'circuit chamber, an annular valve within said annular chamber, and nuts one screwed on the outside and one on'the inside of said annular wall. i

3. In a blow-pipe having an oXygen-channel and a fuel-channel, awall separating said channels, and a valve interposed in one of -said channels and adapted to be closed by back-pressure therein, said valve having an opening, and being spaced at said opening away from said wall.

A4. A blow-pipe having an oxygen-channel and a fuel-channel, 4a wall between said channels, a check-valve in one of said channels, sald valve havlng an opening, and a -nut on said wall adapted to close said opening.

A blow-pipe having a head, anoxygenchannel in said head, a fuel-channel in said head separate from the oxygen-channel, said channels having orifices in said headin'close proximity to each other, a check-valve entirely within the fuel channel in close proximity to the orifices thereof and adapted to be closed b v back-pressure in the fuel-channel caused by back-flashing, said valve having an opening. a check-valve in the oxygenchannel, and a wall separating said valves.

6. In a blow-pipe, the combination of a head provided with'a pair of gas-chambers, one within the other. a nozzle provided with a channel communicating with said gaschambers, an annular check-valve in the outer chamber, and a circular check-valve inone for the oxygen and one for the fuel, the

fuel-chamber surrounding the oxygen-chamber, a nozzle provided wlth a channel communicating with said gas-chambers, a tip nozzle 1n said channel 1n llne wlth the oxy- -v gen chamber, and carried by said nozzle, and adjustable in the nozzle toward and away from the oxygen-chamber of the head, and a mixing chamber between the tip-nozzle and the nozzle.

9. In a blow-pipe, the combinationof a nozzle comprising a base provided with a gas-conducting channel, a cylindrical Ashell secured 'to said base,and a plug provided with a central opening, an annular recess,l openings connecting. said recess and said central opening, and spiral grooves in the periphery of the plug betwee said recess and the outer end of the plug, said plug being placed Within said cylindrical shell, and spaced from said base, whereby a chamber is formed between said plug and said base and an annular chamber is formed between. said plug and said shell.

10. -In a blow-pipe, a. nozzle providedwith a central opening open ati its outer end, an annular series of spirally-arranged Adischarge-openings, and means adapted to conduct gas from the central opening to the' spirally-arranged openings.

11. In a blow-pipe, a. nozzle provided with an annular recess, a series of spirally-arranged discharge-openings communicating. therewith, a central discharge-opening open at its outer end, and means adapted tojconduct gas from said central opening to said annular recess.

12. In a blow-pipe, a nozzle provided with an annular seriesI of spirally-arranged discharge-openings, a central discharge-opening concentric therewith, and an additional series of spirally-arranged openings concentric with and outside of the first series, and

V.means adapted to conduct gas from the central opening to the iirst of said series and means for conducting gas from the central discharge-opening to said additional series.

13. In a blow-pipe, the combination of a stationary head provided with an annular valve chamber and a circular valve chamber concentric therewith, a circular check-valve in said circular valve-chamber, an annular check-valvein said annular valve-chamber, means for supplying gases to said chambers respectively, and means for regulating the flow of the gases'to said chambers.

14. In a blow-pipe, the combination of a lstationary head provided with an annular valve-chamber and a circular Valve-chambery controlling the passage of gas from said concentrietherewith, a circular checklvalve channel to said chamber, and means regulatin: saidcireular valvelchamber, an annular ing the stroke of said check-valveto vary v cheek-valve in .said annular va1ve-chamber, the flow of gas through the chamber. 15

l5 and means for supplying gases to said cham- In testimony, that 'I claim the foregoing bers. .A as my invention, I have signed my name in 1;,5. In'a blow-pipe, the combination of a presence of two subscribing Witnesses.

fuel-ehannel, an oxygen-channel, a station- I WILLIAM I. REICH. ary head provided with a valve-chamber Witnesses: s 10 communicating With one of said channels, a FANNIE FISE,

closed check-Valve in said valve-chamber L. JuMURPHY.

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